[1] Univ Perugia, Dept Med & Surg, Sect Internal & Cardiovasc Med, Perugia, Italy
[2] Univ Perugia, Dept Med & Surg, Div Anaesthesia Analgesia & Intens Care, Perugia, Italy
[3] ASL 1 Umbria, Div Internal Med, Citta Di Castello, Italy
[4] Terni Univ Hosp, Unit Internal Med, Terni, Italy
[5] Citta di Castello Hosp, Sect Anesthesia Intens Care & Pain Med, Dept Emergency & Urgency, Citta Di Castello, Italy
[6] Azienda Osped Univ Santa Maria Misericordia, Sect Anesthesia Intens Care & Pain Med, Perugia, Italy
[7] USL Umbria 1, Sect Anesthesia & Intens Care, Presidio Alto Chiascio, Gubbio, Italy